<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>自定义Promise</title>
</head>
<body>
  <script type=text/javascript>
    const p = new Promise((resolve,reject) => {
      // resolve(1)
      reject(1)
    })
    console.log(p)
  </script>
</body>
</html>